Ordering and dynamics of oligo(phenylene ethynylene) self-assembled monolayers on Au(111)

Hairong Wu, Kai Sotthewes, Peter Manfred Schön, Gyula J. Vancso, Henricus J.W. Zandvliet

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
151 Downloads (Pure)


Self-assembled monolayers of 4-[4′-(phenylethynyl)-phenylethynyl]-benzenethiolate (PPB-S) molecules on flame annealed Au(111) have been investigated by ultra-high vacuum scanning tunneling microscopy. We have found a hitherto unknown self-assembled monolayer phase. This phase consists of a fine-striped pattern that is aligned along the close packed 〈1[1 with combining macron]0〉 directions of the Au(111) surface. The fine-striped pattern has √3 periodicity and is separated by narrow vacancy lines which are oriented perpendicular to the fine-striped pattern. Surprisingly, the herringbone reconstruction of the underlying Au(111) substrate is not fully lifted by the self-assembled monolayer. Spatially resolved current–time scanning tunneling microscopy experiments revealed that the PPB-S molecules at the edges of the vacancy lines exhibit dynamic behavior and frequently jump back and forth between neighboring stripes.
Original languageEnglish
Pages (from-to)42069-42074
JournalRSC advances
Issue number52
Publication statusPublished - 29 May 2015


  • IR-97495
  • METIS-311972

Cite this